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蝴蝶种群数量反应湿地健康

kira86 于2019-08-09发布 l 已有人浏览
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蝴蝶种群数量反应湿地健康,科学家们通过圈养计划,旨在帮助找到蝴蝶减少背后的原因,希望找到方法恢复蝴蝶种群数量。
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Butterfly Populations Reflect Health of Wetlands

蝴蝶种群数量反应湿地健康

This morning we’re going to head off down into the wetland into a very specific kind of wetland called the Prairie fen.

今天早上,8888彩票要去一个非常特殊的湿地,叫做草原沼泽。

This time of year, you can find Nate Fuller counting butterflies.

每年的这个时候,你可以发现Nate Fuller在数蝴蝶。

The director of the Sarett Nature Center needs an accurate count of Mitchell’s satyr butterflies to help preserve one of their last known habitats.

他是Sarett自然中心的主任,需要准确统计米切尔的萨特尔蝴蝶,以帮助保留它们最后的已知栖息地之一。

They’re very particular in the kind of habitat where they can live which is part of what makes them so rare and amazing indicators for our water quality.

它们可居住的栖息地十分特别,这是使它们如此稀有的原因,也使得它们能够成为检验水质的指标。

Today, Sarett expert Ashley Cole-Wick with Michigan’s Natural Features Inventory helps Fuller count.

今天,Sarett专家Ashley Cole-Wick和密歇根州的自然特征目录在帮助Fuller统计蝴蝶数量。

When I first started working on the butterfly in 2013, we had 18 populations and this year in 2019, we have 10.

我从2013年第一次开始从事蝴蝶方面的工作,当时的种群数是18,而今年2019年数字为10。

Finding the small brown butterflies with golden ring dye spots can be difficult.

寻找翅膀上有金色环状斑点的小棕色蝴蝶并不容易。

There just aren’t many around.

周围并没有很多的蝴蝶。

The Mitchell Seder went on the endangered species list in 1991.

米切尔萨特蝴蝶(Mitchell Seder)于1991年被列入濒危物种名单。

Initially it was thought that loss of wetlands contributed to their decline.

最初人们认为湿地的减少导致了它们种群的减少。

It’s not just habitat availability.Its groundwater and the amount in the quality of groundwater coming into these wetlands seem to be a challenge for the butterfly.

不仅仅是栖息地的减少,还有地下水和湿地地下水的质量都让蝴蝶的生存面临挑战。

They say nothing has all been sorted out exactly.

他们说还不知道确切的原因。

While the decline is likely a combination of factors, the fact that water quality might contribute is unsettling.

蝴蝶的减少是一系列因素作用的结果,但是水质也是原因之一,这让人十分不安。

Because the wetlands are the headwaters for the Midwest’s rivers and streams.

因为湿地是中西部河流和溪水的源头。

A captive breeding program was started four years ago at the Toledo Zoo to help get to the bottom of the mystery.

四年前,Toledo动物园内进行了圈养繁殖计划,旨在帮助找到蝴蝶减少背后的原因。

Today Director Ryan Walsh who heads the program says it’s been the only successful captive program.

Ryan主任带领这个项目,表示这个是唯一一个成功的圈养项目。

So we’re starting a captive colony.We will occasionally collect them to add new genetics to the captive population, and we can really breed a large number of the butterflies.

8888彩票建立了一个圈养的场地,8888彩票时不时地加入一些新的种类进圈养种群,这样8888彩票可以繁殖大量的蝴蝶。

The rest of them the ones that won’t be left back for captive breeding will be released out into the wilds.

剩余的不会接受圈养繁殖的蝴蝶则会被放生野外。

The caterpillars spend the winter in a special weather control chamber that help determine the Mitchell satyrs don’t do well below 4.4 degrees Celsius,a temperature that prevents the Fen wetlands from the hard freezes which kill the insects.

毛毛虫在特别的温控室中过冬。从而知道了米切尔萨特蝴蝶不能在4.4摄氏度以下生存,这个温度下对于“草原沼泽”不会过于严寒,但是对昆虫则是致命的。

With that knowledge, the program produced 1300 new eggs this summer, a development that may go a long way toward restoring the population.

知道了这个,该项目一个夏天培育了1300个新卵,这一进展或将帮助恢复该蝴蝶种群数量。

And if all goes well may one day earn the Mitchell satyr butterfly a ticket off Endangered Species List.

如果一切顺利,此种蝴蝶可以移出濒危物种名单。

For VOA News, Erika Celeste, in Benton Harbor, Michigan.

美国之音新闻,Erika Celeste,梅西根本顿港报道。

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